List of sovereign states in 1921

overeign States

A

*flagicon image|Red flag.svg Abkhazia – Soviet Socialist Republic of Abkhazia (from March 31)
*flagicon image|Flag of Afghanistan (1919-1928).svg flagicon|Afghanistan|1921 Afghanistan – Emirate of Afghanistan
*flagicon image|Flag of Albania 1920.svg Albania – Principality of Albania
*flag|Andorra – Principality of Andorra
*flag|Argentina – Argentine Republic
*flagicon image|Red flag.svg Armenia – Armenian Soviet Socialist Republic
*flagicon image|Flag of Asir.svg Asir – Emirate of Asir
*flag|Australia – Commonwealth of Australia
*flagicon|Austria Austria – Republic of Austria
*flagicon image|Azerbaijansovietrep1920-1921.svg Azerbaijan – Azerbaijan Soviet Socialist Republic

B

*flag|Belgium|state – Kingdom of Belgium
*flag|Bolivia – Republic of Bolivia
*flag|Brazil|1889 – Republic of the United States of Brazil
*flagicon|Bulgaria|1878 Bulgaria – Kingdom of Bulgaria

C

*flagicon|Canada|1868 flag|Canada|1921 – Dominion of Canada
*flag|Chile – Republic of Chile
*flag|Republic of China|1912|name=China – Republic of China
*flag|Colombia – Republic of Colombia
*flag|Costa Rica|state – Republic of Costa Rica
*flag|Cuba – Republic of Cuba
*flagicon|Czechoslovakia Czechoslovakia – Czechoslovak Republic

D

*flag|Danzig – Free City of Danzig
*flag|Denmark – Kingdom of Denmark
*flag|Dominican Republic – Dominican Republic

E

*flag|Ecuador – Republic of Ecuador
*flag|El Salvador – Republic of El Salvador
*flag|Estonia – Republic of Estonia
*flagicon|Ethiopia|1897 Ethiopia – Empire of Ethiopia

F

*flag|Finland – Republic of Finland
*flag|Fiume – Free State of Fiume
*flagicon|France France – French Republic

G

*flagicon image|Flag of Georgia (1918-1921).svg Georgia – Democratic Republic of Georgia(to February 11)
*flag|Weimar Republic|name=Germany – German Reich
*flagicon|Greece|royal Greece – Kingdom of Greece
*flag|Guatemala – Republic of Guatemala

H

*flagicon image|Flag of Ha'il 1920.svg Ha'il – Emirate of Ha'il (to November 2)
*flag|Haiti|civil – Republic of Haiti
*flag|Kingdom of Hejaz|name=Hejaz – Kingdom of Hejaz
*flag|Honduras – Republic of Honduras
*flagicon|Hungary|civil Hungary – Kingdom of Hungary

I

*flagicon image|Light Blue Flag of Iceland.svg Iceland – Kingdom of Iceland
*flagicon|Italy|1861 Italy – Kingdom of Italy

J

*flag|Empire of Japan|name=Japan – Empire of Japan

L

*flag|Latvia – Republic of Latvia
*flag|Liberia – Republic of Liberia
*flagicon image|Flag of Liechtenstein (1852-1921).svg flag|Liechtenstein|old – Principality of Liechtenstein
*flag|Lithuania|1918 – Republic of Lithuania
*flag|Luxembourg – Grand Duchy of Luxembourg

M

*flag|Mexico|1917 – United Mexican States
*flag|Monaco – Principality of Monaco
*flagicon image|Flag of the People's Republic of Mongolia (1921-1924).svg Mongolia – Mongolia (from July 11)

N

*flagicon image|Flag_of_the_Second_Saudi_State.svg Nejd – Emirate of Nejd (to August 22)
**flagicon image|Flag of Nejd (1921).svg Sultanate of Nejd (from August 22)
*flag|Netherlands – Kingdom of The Netherlands
*flagicon|New Zealand New Zealand – Dominion of New Zealand
*flag|Newfoundland – Dominion of Newfoundland
*flag|Nicaragua – Republic of Nicaragua
*flag|Norway – Kingdom of Norway

O

*flag|Ottoman Empire – Sublime Ottoman State

P

*flag|Panama – Republic of Panama
*flagicon image|Flag of Paraguay 1842.png Paraguay – Republic of Paraguay
*flagicon image|Flag of Persia (1910).svg Persia – Persian Empire
*flag|Peru|1825 – Peruvian Republic
*flagicon|Poland Poland – Republic of Poland
*flag|Portugal – Portuguese Republic

R

*flagicon|Romania Romania – Kingdom of Romania
*flagicon|Russian SFSR|1918 Russia – Russian Soviet Federative Socialist Republic

*flag|San Marino – Most Serene Republic of San Marino
*flag|Kingdom of Yugoslavia|name=Serbs, Croats and Slovenes – Kingdom of Serbs, Croats, and Slovenes
*flag|Thailand|name=Siam – Kingdom of Siam
*flagicon|South Africa|1910 South Africa – Union of South Africa
*flagicon|Spain|1785 Spain – Kingdom of Spain
*flag|Sweden – Kingdom of Sweden
*flag|Switzerland – Swiss Confederation

U

*flagicon|United Kingdom United Kingdom – United Kingdom of Great Britain and Ireland
*flag|United States|1912 – United States of America
*flag|Uruguay – Eastern Republic of Uruguay

V

*flag|Venezuela|1905 – United States of Venezuela

Y

*flagicon image|Flag of Yemen 1918.svg Yemen – Mutawakkilite Kingdom of Yemen

tates Claiming Sovereignty

*flagicon image|Serbia flag large.png Baranya-Baja – Serb-Hungarian Baranya-Baja Republic (from August 14 to August 25)
*noflag|Bottleneck – Free State Bottleneck
*flagicon image|Flag of the Bukharan People's Soviet Republic.svg Bukharan – Bukharan People's Soviet Republic
*flagicon image|Flag of the Byelorussian SSR (1919).svg Byelorussia – Byelorussian Soviet Socialist Republic
*flagicon image|Flag of Central Lithuania.svg Central Lithuania – Republic of Central Lithuania
*flagicon image|Flag Far Eastern Republic.svg Far Eastern Republic – Far Eastern Republic
*flagicon image|Red flag.svg Georgian SSR – Georgian Soviet Socialist Republic (from February 11)
*flagicon image|Flag of Persian Socialist Soviet Republic.svg Gilan – Persian Socialist Soviet Republic (to September)
*flagicon|Ireland Ireland – Irish Republic
*flagicon image|Flag of Khiva 1920-1923.svg Khorezm – Khorezm People's Soviet Republic
*noflag|Labin – Labin Republic (from March 2 to April 8)
*flagicon image|Flag of Lado.svg Lado – Lado District
*flagicon|Hungary|civil Lajtabánság – Banat of Leitha (from October 4 to November 5)
*flagicon image|Mirdita republic.gif Mirdita – Republic of Mirdita (from July 17 to November 20)
*flagicon image|Flag of the North Caucasian Emirate.svg North Caucasian Emirate – North Caucasian Emirate
*flagicon image|Flag of the Republic of the Rif.svg Rif – Confederal Republic of the Tribes of the Rif (from September 18)
*flagicon|United Kingdom Southern Ireland – Southern Ireland (from May 3)
*flagicon image|Red flag.svg Tannu Tuva – Tannu Tuva (from August 14)
*flagicon image|Flag_of_Tavolara.gif Tavolara – Kingdom of Tavolara
*flag|Tibet – Tibet
*flagicon image|Red flag.svg Ukraine – Ukrainian Soviet Socialist Republic